Step attachment



FIG. 1 is a front perspective view of a step attachment, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof; the left side elevation view is a mirror image of the right side;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a step attachment, as shown and described. 